G'day again,
Tyler will relate to opting for the shed made foam donut option.
Definitely can MF - I can make one in 2 minutes that will last longer (the victa ones seem to squash flat and turn to powder in no time). $1.60 each is nuts for a small piece of foam5 considering I am currently using off cuts from clark rubber that cost $5 and each can make 15 or more
Yup; I just use dark grey sheet polyurethane foam pieces, that came as packing for computer parts - I just test that it's petrol-resistant on a small piece first.
Even used a thin piece of this to fix the horn switch on my Ford Ute - that switch is basically just two metal discs with a piece of foam glued between them as a spring/separator. And of course the foam decays with time...